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Can You Identify These Crystals, Gemstones and Minerals?
play.howstuffworks.com/quiz/can-you-identify-these-crystals-gemstones-and-minerals
Can you tell the difference between peridot and citrine? How about opal and moonstone? If you were a star geologist in another life, this quiz was made for you!
What If We Ran Out of Minerals?
science.howstuffworks.com/science-vs-myth/what-if/what-if-ran-out-minerals.htm
If minerals make up so much of the Earth, why would we ever face shortages? The availability of the resources we use to create products often depends more on our priorities than the planet's supply.
Platinum: What's So Special About the Shiny Metal?
science.howstuffworks.com/environmental/earth/geology/platinum.htm
This white-hot metal not only makes beautiful jewelry, it's coveted for industrial, medical and military purposes too.
How Artificial Sweeteners Work
science.howstuffworks.com/innovation/edible-innovations/artificial-sweetener.htm
Many dieters use artificial sweeteners as a way to cut sugar without eliminating all things sweet. But did you know that some artificial sweeteners have almost as many calories as sugar? Find out how artificial sweeteners work.
How long do skin allergy breakouts last?
health.howstuffworks.com/diseases-conditions/allergies/skin-allergies/skin-allergy-breakouts.htm
Skin allergy breakouts can be caused by foods, drugs or things you've touched. Learn how long skin allergy breakouts last in this article.
Can allergies cause post-nasal drip?
Allergies can cause a wide range of symptoms. Learn whether allergies can cause post-nasal drip in this article.
How Marijuana Works
science.howstuffworks.com/marijuana.htm
Marijuana isn't just a recreational drug for hippies and philosophy majors -- its psychoactive history ranges from Egyptian mummies to modern U.S. politics. What's the big deal about this leafy, green plant?
How Atoms Work
science.howstuffworks.com/atom.htm
Atoms are in your body, the chair you are sitting in, your desk and even in the air. Learn about the particles that make the universe possible.
How Agent Orange Worked
science.howstuffworks.com/agent-orange.htm
UAT 0- Agent Orange was a potent herbicide and defoliant used in large quantities during the Vietnam War. Learn about Agent Orange and its terrible legacy.
How Batteries Work
electronics.howstuffworks.com/everyday-tech/battery.htm
Batteries power the appliances you use daily. Check out battery experiments, the history of batteries, battery reactions and the chemistry behind battery power.